Product Security Engineer (Remote)

Toronto, ON

Applications have closed
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Mattermost is the industry’s leading open-source enterprise-grade messaging platform. Customers including Intel, Ubisoft, Samsung, Cigna, BNP, European Commission, Social Security Administration, and Affirm use Mattermost to enable their teams to collaborate securely and privately anywhere. Many of the world’s leading privacy-conscious enterprises like The US Department of Defense work better by connecting people, tools, and automation to increase developer collaboration using Mattermost. Our private cloud messaging platform offers secure, configurable, highly scalable messaging using web, mobile, and desktop applications and provides deep integrations with hundreds of SaaS and on-premises tools and applications. 
We value high impact work, ownership, self-awareness and being focused on customer success. If these values match who you are, we hope you'll learn more about working at Mattermost and apply!
Working in open source means your work is publicly visible. Your code will receive both credit and constructive critique from the community. With the right mindset and support these can lead to you a highly positive working environment and making the best engineering decisions of your career. Core committers include highly skilled volunteer developers from the community, staff employed by enterprises deploying and investing in Mattermost, as well as staff employed by Mattermost, Inc. Read about our end-to-end recruiting process for core committers at:
Mattermost is seeking a result-driven and analytical Product Security Engineer to help ensure the security of our product and services across the company. As part of our Security team you will work closely with a globally distributed team to support in all the different aspects of the software development life cycle. You will be responsible for the implementation of additional application security tooling and/or processes across the company and coordinate with relevant stakeholders, gather requirements, and lead the implementation.


  • Ownership of vulnerability management and mitigation approaches
  • Support threat modeling of in-house developed software components
  • Conduct application security reviews through manual code review or static/dynamic code analysis
  • Architecture and review of security components
  • Provide security training and outreach to internal development teams
  • Develop security guidance documentation
  • Support the development of our application security program
  • Maintain and grow our bug bounty program

Required Background/Skill:

  • Bachelor's degree in Computer Science or related fields, or significant professional application security experience
  • Familiarity with common security libraries, security controls, and common security flaws 
  • Experience with static/dynamic analysis, and common exploit tools and methods
  • Experience in one or more programming languages, ideally Go or Javascript
  • Comfortable with using Git
  • Excellent written and verbal communication skills
  • Demonstrable teamwork skills and resourcefulness
  • Linux experience

Preferred Background/Skill:

  • Experience working in open source communities
  • Experience with OWASP SAMM or other security assessment standards
  • Certifications in the domain of penetration testing, or application security (e.g. OSCP, OSWE, GWAPT, …)
  • Experience with Kubernetes / Docker
  • Experience working in open source communities
  • Participation in Bug Bounties, CTFs or similar activities
Note: We will consider only candidates based out of the countries we can hire from in North and South America as we need timezone coverage in this region.
Mattermost is a remote-first company with staff living and working across the globe. We are currently hiring staff in these countries/regions:
Canada - Chile - Finland - Georgia - Germany - India - Mauritius - Philippines - Poland - South Africa - Turkey - Ukraine - United Kingdom  - United States 
We are constantly working towards adding more countries/regions to this list, but first we need to make sure we are compliant with local laws and regulations, which takes time. 
Mattermost is made up of people from a wide variety of backgrounds and lifestyles. We embrace diversity and invite applications from people from all walks of life. We don't discriminate against staff or applicants based on gender identity or expression, sexual orientation, race, religion, age, national origin, citizenship, disability, pregnancy status, veteran status, or any other differences. Also, if you have a disability, please let us know if there's any way we can make the interview process better for you; we're happy to accommodate!
Job region(s): Remote/Anywhere North America
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